It's okay, Margulis is honestly kind of a nerd himself. He'll go on forever about history and ancient cultures/mythologies if you let him, and he's very prone to asking questions. Also, he doesn't wax poetic. He wanes laconic, and only rarely.

Margulis runs his own thing, just one of those independent combat dojos you see around. He'll be perfectly willing to give lessons to other Persona users, and would probably have a class specifically for them, to be honest. Teaching things more oriented toward mixed melee and magic and fighting non-humanoid enemies.